takt

A glance at your car, while you drive it.

Support and answers.

takt reads live data from your car through a Bluetooth OBD-II adapter and shows the few numbers worth seeing at speed — then, once you park, a short read on the drive you just finished. It runs entirely on your iPhone.

What you need

Which cars work

Two cars have been measured signal by signal against the vehicle itself, and takt has a purpose-built screen for each:

For every other car, takt asks what it supports and shows what it finds. Most petrol and diesel cars will produce a working glance — engine speed, coolant temperature, load, fuel level, battery voltage — because those values are part of the OBD-II standard.

Being straight with you: this is the part that has not been proven on a wide range of cars. What your car reports depends on the manufacturer, and takt will only ever show values it can actually read and trust. If a number is missing, that is takt declining to guess rather than takt failing. If your car comes up thin, send a session log and it can usually be improved.

Electric cars other than the ID.4 are the current gap: the values that matter on an EV are mostly manufacturer-specific rather than standard, so support has to be built one car at a time.

Try it without a car

Tap SAMPLE DRIVE on the first screen. It replays a real recorded drive through the whole app, so you can see exactly what takt does before buying an adapter.

CarPlay and the Lock Screen

If your car has CarPlay, takt shows the same live values there. During a drive it also runs a Live Activity, so distance and the value worth watching stay on your Lock Screen and Dynamic Island.

Connecting

Plug the adapter in, start the car, and open takt. The first connection can take a minute or two while the adapter wakes up and takt works out what it is talking to — this is normal and only slow the first time.

If it sits on looking for adapter: check the adapter is seated firmly, that the ignition is on, and that no other OBD app is holding the connection. Only one app can use an adapter at a time.

Sending a session log

takt keeps a log of every session, and that log is usually enough to diagnose anything that went wrong. Open the Files app, go to On My iPhone → takt, pick the most recent log, and mail it over. The logs contain adapter traffic and nothing personal — no location, no VIN, no account of any kind.

Known limits

Contact

juergen@klaassen.consulting — questions, adapters that misbehave, and cars you would like supported.